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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef MESHDATA_H
#define MESHDATA_H
#include <QSharedPointer>
#include <QList>
#include <QMap>
#include <QOpenGLBuffer>
#include <QVector2D>
#include <axisalignedboundingbox.h>
namespace Qt3D
{
GLint elementType(GLint type);
GLint tupleSizeFromType(GLint type);
GLuint byteSizeFromType(GLint type);
class Buffer
{
public:
Buffer(QOpenGLBuffer::Type ty);
void setUsage(QOpenGLBuffer::UsagePattern usage);
void setData(QByteArray bytes);
QByteArray data() const;
QOpenGLBuffer::Type type() const
{ return m_type; }
void bind();
QOpenGLBuffer createGL() const;
void upload(QOpenGLBuffer b);
// make a QObject and signal when contents change?
// GraphicsContext could listen, orphan the QOpenGLBuffer and hence
// reupload next time it's need
private:
const QOpenGLBuffer::Type m_type;
QOpenGLBuffer::UsagePattern m_usage;
QByteArray m_clientSideBytes;
};
typedef QSharedPointer<Buffer> BufferPtr;
class Attribute
{
public:
Attribute(BufferPtr buf, int type, int count, int offset=0, int stride = 0);
void setDivisor(unsigned int divisor);
unsigned int divisor() const
{ return m_divisor; }
BufferPtr buffer() const;
int type() const
{ return m_type; }
unsigned int count() const
{ return m_count; }
unsigned int byteStride() const
{ return m_stride; }
unsigned int byteOffset() const
{ return m_offset; }
QVector<QVector3D> asVector3D() const;
QVector<QVector2D> asVector2D() const;
void dump(int count);
private:
BufferPtr m_buffer;
int m_type, m_count;
unsigned int m_stride, m_offset; // both in bytes
// AxisAlignedBoundBox m_range;
unsigned int m_divisor;
};
typedef QSharedPointer<Attribute> AttributePtr;
/**
* @brief The MeshData class is shared by all instances of a RenderMesh,
* and holds the actual client (CPU)-side buffers representing mesh attributes
* and indices.
*/
class MeshData
{
public:
MeshData();
explicit MeshData(int primitiveType);
void addAttribute(QString name, AttributePtr attr);
// permit inline 'new' call, will take ownership
void addAttribute(QString name, Attribute* attr);
void setIndexAttr(AttributePtr indexAttr);
void setIndexData(BufferPtr buf, int type, int count, int offset = 0);
GLint primitiveType() const;
GLsizei primitiveCount() const;
QStringList attributeNames() const;
AttributePtr attributeByName(QString nm) const;
AttributePtr indexAttr() const;
QString materialName() const;
QList<BufferPtr> buffers() const;
// specify the bounding box explicitly
void setBoundingBox(const AxisAlignedBoundingBox& bbox);
void computeBoundsFromAttribute(QString name);
AxisAlignedBoundingBox boundingBox() const
{ return m_box; }
private:
QMap<QString, AttributePtr> m_attributes;
QString m_materialName;
int m_primitiveType;
AttributePtr m_indexAttr;
AxisAlignedBoundingBox m_box;
};
typedef QSharedPointer<MeshData> MeshDataPtr;
}
#endif // MESHDATA_H
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